presence(k): copy evs_subs_handl to presence event list

- patch by Nikita Kozlov, closes FS#82
(cherry picked from commit 9216a2ffa4c6ffd4bdd387530cad359f75acf0d7)

modules_k/presence/event_list.c

@@ -240,6 +240,7 @@ int add_event(pres_ev_t* event)
 	ev->get_auth_status= event->get_auth_status;
 	ev->get_rules_doc= event->get_rules_doc;
 	ev->evs_publ_handl= event->evs_publ_handl;
+	ev->evs_subs_handl= event->evs_subs_handl;
 	ev->etag_not_new= event->etag_not_new;
 	ev->aux_body_processing= event->aux_body_processing;
 	ev->aux_free_body= event->aux_free_body;